Book excerpt: Among the many changes brought by the Internet is the emergence of electronic commerce over the Web. E-commerce activities, such as the online exchange of information, services, and products, are opening up completely new opportunities for business, at new levels of productivity and profitability. In parallel with the emergence of e-commerce, intelligent software agents as entities capable of independent action in open, unpredictable environments have matured into a promising new technology. Quite naturally, e-commerce agents hold great promise for exploiting the Internet's full potential as an electronic marketplace. The 20 coherently written chapters in this book by leading researchers and professionals present the state of the art in agent-mediated e-commerce. Researchers, professionals, and advanced students interested in e-commerce or agent technology will find this book an indispensable source of information and reference.